Electroencephalogram is a medical device that measures the electrical activity of the brain by placing electrodes on the scalp. The electrodes detect the brain waves, which are then recorded and analyzed

Motor imagery is the mental simulation or rehearsal of a movement without actually performing it. It involves imagining oneself executing a specific action, focusing on the sensory and motor aspects of the movement.

This is a technology that allows for direct communication between the brain's electrical activity and an external device, like a computer or robotic limb.